Sharpening and polishing machine



3 F. BIKLES 2,648,174

SI'IARPENING AND POLISHING MACHINE Filed larch 28. mo

53 v. a a

1i 1? f! 1, & ff 36 O 41 u; 4 w 1 I f1 INVENTOR.

4; xx Ff 14250" Patented Aug. 11, 1953 UNITED STATES PATENT OFFIE SHARPENING AND POLISHING MACHINE Fred Bikles, New York, N. Y. I

Application March 28, 1950, Serial No. 152,325

1 Claim.

This invention relates to a combined grinding" and polishing equipment.

It is an object of the invention to provide a combined grinding and polishing machine,

adapted to sharpen-knives of .-all sizesubysimplycbrackets mounted on the guideways and operated by an adjusting screw, each of said brackets having upstanding projections to which the set of grinding wheels areattachedby respective end attaching elements and whereby thesaid grinding wheels can be removedfrom the adjustable bracket by a simple release of the attaching elements from the. upstanding projections of the bracket and thereby making it une necessary to remove the brackets from the guideways and wherein an adjusting screw havingreverse threads operate on the respective brackets to bring the grinding wheel sets carriedrespectively thereby either toward or away from each other depending upon the direction in which the adjusting screw is turned and in a simultaneous manner.

Other objects of the invention are to provide a combined grinding and polishing machine which is of simple construction, inexpensive to manufacture, easy to adjust, and compact, which has a minimum number of parts, and which is durable and efficient in operation.

For a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which:

Fig. 1 is a side elevational view of the grinding and polishing machine embodying the features of the present invention.

Fig. 2 is an end elevational view looking upon the end of the machine having the polishing elements with the polishing elements omitted.

Fig. 3 is an end elevational view of the machine as viewed from the opposite side of the same.

Fig. 4 is a fragmentary top plan view of the machine.

Fig. 5 is an enlarged fragmentary vertical sectional view, taken. on line-5-5 of' Fig. 2, and through the bracket and theattaching elementfor the grinding wheel set.

Fig. 6isan enlarged fragmentary" side-elevaw tional view of the bracket and the attaching .ele-

- ment for the grinding wheel set shaft.

t guideways I5 and [6 on the Referring now to the figures, l0 represents a base support on which is mounted an electric motor ll thatcan be operated fromanyelectricso'u-rce: Extending upwardly; from the sidesr-of the base [0 are vertical support members l2 and.

I3 between which the electric motor H. isiretained and on the upper ends of'whichth'ere is supported a frame [4 havin parallel dove-tail respective opposite ends thereof; Adjustable on the guideways l5 and I6 are opposing supporting brackets l1 and I l 8 that are" connected together by an adjusting screw- [9 having opposite threads 20 and-2| upon the respective opposite ends thereof, whereby upon turningthe screwbytits knob:22ithe brackets. Ihand': I8

can be adjusted either toward each other. or away.

from each other.

Upon the opposite ends of. each of the adjustable brackets l7 and [8' are respectively upstanding arcuate projections 23 and 24. The-end of 'each projection has a-reducedportion 25xfor receiving ashaft bearing assembly'26' bymeans of-its socket projection 21. A screw 28- fixes the socket projection to the reduced portion .25 there by to hold the bearing assembly upon the upstanding arcuate projection.

By means of these bearing assembly attachments 26, sets of grinding wheels are mounted upon the adjustable brackets I1 and 18 so that they will be adjusted therewith toward and away from each other. In each bearing assembly is a shaft 29 journalled at each end thereof in hearing elements 30 in the bearing assembly attachment member. Each shaft contains a different set of grinding wheels. One shaft has three grinding wheels 3 I, which are held in spaced relationship by spacing elements 32. The other shaft or set comprises two grinding wheel elements indicated at 33 and are adapted to extend between the grinding wheel elements 3| on the one shaft. The other shaft also has spacing elements 34 for holding the two grinding wheels 33 in spaced relationship on the shaft. Each shaft has end plates 35 for holding the assembly of the grinding wheels and the spacing elements together. By adjusting the screw l9 the grinding wheels can be brought closer to one another or 3 further away depending upon the angle of cut desired on the sides of the knife blade.

Each shaft has an extension on which polishing units 36 are provided. Each polishing unit comprises several leather discs which are fixed to the shaft to turn therewith without slippage.

The drive of these shafts 29 is effected between the electric motor and pulleys 31 and 38 on the respective shafts. The electric motor II has a double pulley 39 and V-belts 40 and M extend respectively from this double pulley 39 and connect respectively with the pulleys 31 and 38 on the respective shafts 29. Each pulley belt 40 extends over two idler pulleys 42 and 43 on the frame I! and laterally spaced from each other. There is a similar pair of pulleys at each side of the frame M.

It will be seen to sharpen the knife that the knife is disposed between the sets of grinding wheels and with these wheels being driven in the same direction, the same grinding force is applied to the respective opposite sides of the knife blade, whereby the knife blade will be kept in balance while it is pulled longitudinally between the sets of grinding wheels. The grinding wheel sets are brought closer and closer to each other, by the adjustment of the screw [9, in order to obtain the desired grinding angle. The knives are drawn lengthwise over the grinding wheels.

It will be seen that the grinding wheel sets can be easily removed from the adjustable brackets l1 and I8 by loosening and removing screws 28 which hold the bearing assembly attachments 21 on the reduced projections 25.

It will now be apparent that there has been provided a sharpening and polishing machine which is easy to operate and which will effectively sharpen knives and as well provide a polishing means for objects found about the kitchen.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the appended claim.

I claim:

A sharpening machine for blades comprising a base support, a frame, a frame pedestal piece mounted on said support for supporting said frame, said frame having parallelguide projections disposed respectively at the opposite sides thereof, brackets extending between the guide projections and slidable thereon, an ad- 4 justing screw having opposite threads engaging with the respective brackets to adjust the same toward and away from one another, each of said brackets having upstanding portions at the opposite ends thereof, bearing attachments releasably connected to the upstanding projections, said upstandin projections on the adjustable brackets being curved upwardly and inwardly and having a reduced projection, said bearing attachments respectively having a curved socket portion adapted to fit respectively the curved projections of the upstanding portions of the brackets, a shaft journalled between the bearing attachments and having grinding wheels fixed thereon, spacing elements separating the grinding wheels, an electric motor disposed under the frame and resting upon said base support, a double pulley driven by said motor, single pulley means carried by each of said shafts, endless belts extending between the double pulley of the electric motor and the pulley of each shaft to rotate said shafts, idler pulleys carried by said frame, one of said idler pulleys engaging each flight of each endless belt constantly to tension each belt to effect a continuous driving connection between the motor and each belt regardless of the relative position of said shafts with respect to each other, the grinding wheels of the respective shafts being so spaced that they overlap one another and operate simultaneously on the respective opposite sides of a blade when said shafts are adjusted toward each other.

FRED BIKLES.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 849,391 Henry et al. Apr. 9, 1907 1,115,640 Winter Nov. 3, 1914 1,925,108 Nagy Sept. 5, 1933 2,228,385 Burns Jan. 14, 1941 2,301,351 Willmott Nov. 10, 1942 FOREIGN PATENTS Number Country Date 289,311 Great Britain Apr. 26,1928 794,699 France Dec. 12, 1935 475,216 Great Britain Nov. 16, 1937 487,973 Great Britain June 29, 1938 531,771 Great Britain Jan. 10, 1941 

